Table 2 Socio-demographics and adverse health conditions by migrant status and delivery mode
|  | All subjects(n = 40,621) | Subjects of Group 1 based on Robson Classification(n = 13,616) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Migrant status | Delivery mode | Migrant status | Delivery mode | |||||||||||
Residents n(%) | Migrants n(%) | p | CSMR n(%) | MICS n(%) | Vaginal Birth n(%) | p | Residents n(%) | Migrants n(%) | p | CSMR n(%) | MICS n(%) | Vaginal Birth n(%) | p | |
Total numbers | 27,169 | 13,452 | Â | 7496 | 10,827 | 22,298 | Â | 8491 | 4675 | Â | 391 | 403 | 12,822 | Â |
Maternal age at delivery | ||||||||||||||
  < 20 | 479 (1.8) | 242 (1.8) | < 0.001 | 180 (2.4) | 133 (1.2) | 408 (1.8) | < 0.001 | 185 (2.1) | 85 (1.8) | < 0.001 | 11 (2.8) | 7 (1.7) | 252 (2) | < 0.001 |
 20–34 | 23,210 (85.4) | 11,772 (87.5) |  | 7316 (97.6) | 7467 (69.0) | 20,199 (90.6) |  | 8278 (92.6) | 4408 (94.3) |  | 380 (97.2) | 319 (79.2) | 11,987 (93.5) |  |
  ≥ 35 | 3480 (12.8) | 1438 (10.7) |  | 0 (0) | 3227 (29.8) | 1691 (7.6) |  | 478 (5.3) | 182 (3.9) |  | 0 (0) | 77 (19.1) | 583 (4.5) |  |
Ethnicity | ||||||||||||||
 Han | 26,878 (98.9) | 12,973 (96.4) | < 0.001 | 7349 (98) | 10,618 (98.1) | 21,884 (98.1) | 0.809 | 8849 (99.0) | 4527 (96.8) | < 0.001 | 382 (97.7) | 396 (98.3) | 12,598 (98.3) | 0.713 |
 Others | 291 (1.1) | 479 (3.6) |  | 147 (2) | 209 (1.9) | 414 (1.9) |  | 92 (1.0) | 148 (3.2) |  | 9 (2.3) | 7 (1.7) | 224 (1.7) |  |
Health insurance | ||||||||||||||
 Yes | 18,307 (67.4) | 6215 (46.2) | < 0.001 | 5187 (69.2) | 5665 (52.3) | 13,670 (61.3) | < 0.001 | 6310 (70.6) | 2409 (51.5) | < 0.001 | 138 (35.3) | 236 (58.6) | 4523 (35.3) | < 0.001 |
 No | 8862 (32.6) | 7237 (53.8) |  | 2309 (30.8) | 5162 (47.7) | 8628 (38.7) |  | 2631 (29.4) | 2266 (48.5) |  | 253 (64.7) | 167 (41.4) | 8299 (64.7) |  |
Occupation | ||||||||||||||
 Non-managerial position | 21,501 (79.1) | 9856 (73.3) | < 0.001 | 5820 (77.6) | 8305 (76.7) | 17,232 (77.3) | 0.312 | 7034 (78.7) | 3473 (74.3) | < 0.001 | 286 (73.1) | 295 (73.2) | 9926 (77.4) | 0.207 |
 Managerial position | 84 (0.3) | 138 (1) |  | 43 (0.6) | 51 (0.5) | 128 (0.6) |  | 34 (0.4) | 46 (1.0) |  | 3 (0.8) | 2 (0.5) | 75 (0.6) |  |
 Unemployed | 543 (2) | 813 (6) |  | 266 (3.5) | 362 (3.3) | 728 (3.3) |  | 141 (1.6) | 238 (5.1) |  | 11 (2.8) | 12 (3) | 356 (2.8) |  |
 Workers (conducting physical labor) or others | 5041 (18.6) | 2645 (19.7) |  | 1367 (18.2) | 2109 (19.5) | 4210 (18.9) |  | 1732 (19.4) | 918 (19.6) |  | 91 (23.3) | 94 (23.3) | 2465 (19.2) |  |
Marital status | ||||||||||||||
 Married | 27,105 (99.8) | 13,410 (99.7) | 0.154 | 7478 (99.8) | 10,792 (99.7) | 22,245 (99.8) | 0.332 | 8916 (99.7) | 4662 (99.7) | 0.987 | 389 (99.5) | 401 (99.5) | 12,788 (99.7) | 0.465 |
 Not married | 64 (0.2) | 42 (0.3) |  | 18 (0.2) | 35 (0.3) | 53 (0.2) |  | 25 (0.3) | 13 (0.3) |  | 2 (0.5) | 2 (0.5) | 34 (0.3) |  |
Adverse health conditions a | ||||||||||||||
 Yes | 6102 (22.5) | 2674 (19.9) | < 0.001 | 1695 (22.6) | 3188 (29.4) | 3893 (17.5) | < 0.001 | 1493 (16.7) | 664 (14.2) | < 0.001 | 67 (17.1) | 111 (27.5) | 1979 (15.4) | < 0.001 |
 No | 21,067 (77.5) | 10,778 (80.1) |  | 5801 (77.4) | 7639 (70.6) | 18,405 (82.5) |  | 7448 (83.3) | 4011 (85.8) |  | 324 (82.9) | 292 (72.5) | 10,843 (84.6) |  |